Closure-locking means.



0. J. LJUNGGRENI CLOSURE LOOKING MEANS.

APPLICATION FILED APR. 4, 1910.

977,646. Patented Dec.6,1910.

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ATTEIRNEY.

CARL J. LJUNGGREN, 0F PROVIDENCE, RHODE ISLAND.

CLOSURE-LOCKING MEANS.

Specification of Letters Patent.

Patented Dec. 6, 1910.

Original application filed September 2, 1908, Serial No. 451,444.Divided and this application filed April 4,

To all whom it may concern:

Be it known that I, CARL J. LJUNGGREN, a subject of the King of Sweden,residing at Providence, in the county of Providence and State of RhodeIsland, have invented certain new and useful Improvements inClosure-Locking Means, of which the following is a specification.

My invention relates to closure locking means adapted for use in suchstructures as gun breeches, port holes, man holes and vault doors, andis a division of my pending patent application Serial No. 451,444, filedSept. 2, 1908.

The essential objects of the present invention are to afford a maximumof pressure resisting surface in the structure; to dispense with theemployment of screw threads whose expense of construction and facilefracture and disintegration in use make them unclesirable and dangerous;to distribute the strain upon the closure member; to render the interiorparts inaccessible; and to attain these ends in a simple and inexpensivestructure.

To the above ends my invention consists in the novel construction andcombination of parts set forth in and falling within the scope of theappended claims.

Figures 1 and 2 are rear and side elevations respectively of my novelclosure member, Fig. 3, a rear end elevation of the stationary member,Fig. 4, a section of the same on line as m of Fig. 3, Fig. 5, a rearelevation of the closure member in engaged position within the orificeof the stationary member, and Fig. 6, a section of the same on line 3 3of Fig. 5.

Like reference characters indicate like parts throughout the views.

My invention is embodied in a closure member A which is a plug, block,or door adapted to be seated in a stationary member B which is either abreech or jamb. The mechanism for supporting, inserting, rotating andwithdrawing the member A forms no'part of the present invention and iswell known in the art hence herein omitted.

In detail the closure member A comprises a substantially cylindricalbody portion, a, having intermediate its length a plurality Serial N 0.553,302.

of annularly arranged segments C equidistant from each other, and eachcomprising a plurality of radially graduated stepped portions D, E, FThe peripheries of the stepped portions comprise inclined bearingsurfaces cZ, cl, 6, e, and f, 7, respectively extending from the sidesof the segment outwardly and converging in lines d c and f respectively,disposed centrally of the stepped portions in the present instance. Theend or radial faces d 6?, f of the stepped portions are non-inclined.

The receiving or stationary member is in this instance a collar B fixedin any suitable manner in the wall I whose inner face is 2' and whoseouter face is 2' This collar incloses a substantially cylindricalorifice, J of preferably reduced diameter at its front end to form anabutment K. The orifice has a circumferential series of radiallygraduated entrance openings L, M, N, which merge into annularly arrangedradially graduated channels or seats 0, P, Q, respectively, havingconverging inclined side bearing faces 0, 0, p, p, and q, q, andnon-inclined radial end faces or abutments, 0 p and 9 respectively.

The parts A and B are interengaged as follows. The member A disposed asin Fig. 2 is introduced as a sliding fit into the member B from right toleft as viewed in Fig. 6, the stepped portions D, E, F, entering thechannels L, M, N, respectively. The member A is then turned in thedirection of the arrow shown in Fig. 5 to bring the portions D, E, F,into the seats 0, P, Q respectively, with the converging faces d d, e e,and f f, in frictional contact with the bearing faces 0 0, p p, and g grespectively; and the radial facesd e, f against the abutments 0 p and grespectively.

What I claim is,-

1. In a device of the type set forth, the combination with a stationarymember, of a closure body, and a segment upon the body comprisingradially graduated stepped portions provided with converging peripheralbearing surfaces.

2. In a device of the type set forth, the combination with a stationarymember, of a closure body comprising radially graduated steppedportions, said stepped portions bearing faces converging in linesdisposed being provided with inclined outwardly concentrally of thestepped portions. 10 verging peripheral bearing surfaces. In testimonywhereof I have afiixed my 3. In a device of the type set forth, thesignature in presence of two witnesses. combination with a stationarymember, of CARL J. LJUNGGREN.

a closure body comprising radially gradu- Witnesses: ated steppedportions, said stepped portions HORA'IIO E. BnLLows being provided withperipheral inclined WILLIAM E. TEFFT.

